Fuel-saving attachment for furnaces.



-N. 3. RUSSELL. FUEL SAVING ATTACHMENT FO R FURNACES.

APPLICATION FILED MAR. 12. .915.

1,150,456. Patentedfxug. 17 1825.

OFFICE.

FUEL-SAVING ATTACEMENT FOE FURNACES.

Specification of Letters iatent.

Patented Aug. 17, 1915.

Application filed March 12, 193.5. Serial No. 14,018.

To all whom it may concern:

Be it known that I, Henson 5. Rossetti, a citizen of the United States, residing at the city of Chicago, in the county of Cook and State of lllinois, have invented certain new and useful Improvements in Fuel-Saving Attachments for Furnaces, of which the following is a specification.

This invention relates to improvements in an attachment to he applied to furnaces, stoves or ranges, but more particularly to the furnaces of power and heating plants, and it consists in certain peculiarities of the construction, novel arrangement and operation of the parts thereoies will he hereinafter more fully set forth and specifically claimed.

, admitted to alid distrihuted within the furnace, and so that its heated oxygen will he utilized to increase from a given amount of fuel, the combustion of the combustible gases, or of the free carbon released during the burning of such fuel. thus attaining the i mum amount of heat units from the fuel, well a: reducing to a minimum, or preventing p ssing oil, in the form of smoke, of unconsunipd particles of carbon or unhurnt gases. 1

Another 0 ject of the invention is to provide an attachment apparatus of the above described general character, vhich shall he extremely simple and inexpensive in construction, and easily connected to the furnace, yet strong and durable, with its parts so made that, if desired, it he mounted on the door of the furnace leading to the fire-box or con'll)ustion-chamher, so as to he carried thereby, or that it may be mounted on the wall of the firebox or said chamber and perform its functions in a satisfactory manner.

Still anot or object is to provideiineans for regulating the admission of atmospheric ir to the apparatus, of utilizing heaters ternallyof the furnace for initially warnr' ing or heating the'air before or as it passes through the door or wall of the furnace into the inner portion of the attachment, and then affording conduits or passages for the air, whereby they will present a very great area or surface to the inflamed or burning mass of the combustion chamber, so that the air will be superheated, or raised to a very hi gh temperature on its passage through the apparatus and as it is discharged into the furnace.

Numerous other objects and advantages of theinvention will be disclosed in the subjoined description and explanation.

In the accompanying drawing, which serves to illustrate the invention-Figure 1 is a plan view of the fuel saving attachment, showing it mounted on a portion of the door of a furnace; Fig. 2 is a vertical longitudinal sectional view taken on line 2-2 of Fig. 1, looking in the direction indicated by the arrows; and Fig. 3 is a cross sectional view partly in elevation taken on line 3-3 of Fig. 2, looking in the direction indicated by the. arrows. J

Like numerals of reference refer to like parts throughout the different views of the drawing.

The reference numeral 5 designates a per-- tion of the door to the fire-box of a furnace,

which may be hinged to the furnace in the ordinary or any preferred way, and said door has an opening 6, which may be of the ordinary kind, and for the usual purpose. Mounted on the outer portion of the door or support 5, which in some instances may be the front plate of the furnace or one of the walls thereof, and provided with an opening the outer section or portion 7 of the fuel saving attachment, which portion is contracted toward its outer or free end and is provided at its inner end with an enlarged chamber 8, which chamber or on;

larged casing is provided at each ofits corners 'ith an aperturcd lug 9, to rest against the outer surface of the door or support 5, and said lugs provide means for hanging or mounting the cosine 8 and its extension 7 on the outside of the said door or support, as will he presently explained. The outer or intake end of the chamber 7 has fitted therein apertured'plug 19, which by preference frictionally held. therein and can be removed as desired to permit of another plug having an aperture of greater or less size than that shown-in the drawing, so as to admit of more or less atmospheric air to the intake portion of the attachment.

The inner portion of the attachment onsists of a series of spaced apart chambers or hollow casings 11, which are by preference substantially rectangular in shape when viewed from the discharging end of theapparatus, and are made of quite thin metal, so that the air passing through said chambers or casings may be quickly heated by the heat in'the lire-box; ()wing to the thinness'of the metal or material out oi which the inner portion of the attachment isu'nade, I may unite the chamber casings or members ll by means of connections 12, formeddntogrally therewith, as is clearly shown in Fig. 2 of the drawing, but it is obvious that said connections may no dispensed with, if desired: The chambers or casings 11 are connected in pairs alternately at their upper and lower portions by means of hollow portions or tubular extensions 13, throughwhich the air will pass from one of the chambe'rs'or casings 11 to the other. Connected to the upper portion of the innermost casing or chamber 11 by means of a hollow or tubular extension 14, is an eX- pansion chambeidor air spreader 15, which 15 provided at its central portion with a horizontally disposed slot l6, through which the air-will be discharged into the lire-box or combustion chamber of thefurnace in the form of a fan-tail sheet, and in a uniform manner, for it will be understood that the cavity of the expansion chamber or spreader 1 at its outer portion is located at an equal distance throughout its entire extent from a given point in. the throat or hollow extension ll, which leadsfrom the innermost chamber or casing 11 to said spreader or expansion chamber. The chambercasing 11 adjacent to the (looror support 5, is provided at each of its corners with an apertured lug 17, to rest against the inner surface of the door or support 5, said lugs being employed to support the inner portion or' theidevice on the inner surface of the 'door,.for by reference to Figs. 1 and 2 of the drawing, it will be seen that a screwbolt 18 is extended through the openings .in each ofthe lugs!) ot'..thc outer portion of the attachment, aswell as throu h suitable openings in the door or support a, and also through the openings in the lugs 17, and are held in place by means of nuts 19, 311- gaging said screw bolts.

it will be clearly seen by reference to Fig.,,l that the casings or members 11 are reducedsuccessively in size rezu -wardly from the door or support 5', so that they may not intericre with the opening and closing of the door when the device is mounted thereit passes through said portion it will be heated or warmed by the external heat of the furnace, which atthe i'urnace door is i usually or of p1ile a high temperature, and

that the air will pass from the intake portion. 7 and chamber 8 thereof through the. opening into the chamber. 11 adjacent to the door or support 5, and fromthence thrmigh theeircuitous passagc or way pro- \ided by the hollow members or portions 13 and chambers l1,-b mea ns of which passageway and the novelconstruction thereol', the air will be subjected'to the iniiarnnmble mass within the firebox andcheat'edto a very high degree of temperature, to be discharged through the opening or slot 16 in the spreader into the fire-box. The damper which controlsvthe draft through the line of the furnace may be regulated so as to regulate or assist the passage of air through the apparatus, as isobvious. I The advantages oiF-preheating the air draft to a .lfurna'cej and discharging ordispersing it into or within the furnace or firebox thereof is well-known, and needs no further comment here, and'it is also Well-v known that many forms of apparatus form this purpose haye been heretofore employed, and for this reaso'IrI do not herein claim means broadly for preheating and distributing air within the furnace, but 'I 10, base my claims on the specific construction and arrangement of the parts of my apple-' ratus for-said purpose. y

It will be observed by reference to Fig; 2 i of the drawing, that the hollow connecting chamber 14, is of less size than the device, exclusive of the apcrturedplugs, in the outer end of the intake membezy'whichcon struction will. to some extent retard the passage of air through the apparatus, so that it can be thoroughly'heated, yet in such a manner that continuouscirculation or distribution of heated air Will be afforded.

6 Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is- 4 L In aj fuel saving attachment for furnaces, the combination with'a furniae'wall creasing communicating spaced apart casings disposed in vertical planes with each other and having means at its inner portion for the discharge of air therefrom into i the furnace in a horizontally disposed fanshape, the said inner member being mounted on the said door with its casing adjacentthereto encompassing the opening within the door, and the casings of said member having alternately at their opposite outer portions communication with one another. 2. In a fuel saving attachment for furnaces, the combination with a door hinged to the furnace and having an opening therein leading to the combustion chamber of the furnace, of a hollow intake member mounted on the outer surface of said door and provided with a casing encompassing the o ening thereof, and an inner member consisting of a plurality of successively decreasing spaced apart casings having means at its inner portion for the discharge of air therefrom into the furnace, themasings having alternately at their,opposite outer portionsvcommunication with one another, 7

the said inner member being mounted on the said door with its casing adjacent thereto encompassing the opening therein and providing a chamber around said opening, and an' expansion chamber, artly spherical in shape and mounted on t e inner end of .said inner member and communicating therewith through an opening of less area that the other openings leading from one casing to the other, the said expansion chamber having a horizontally disposed slot extended from one side of its vertical wallto the other side thereof, to the end, that the assaige of air through said slot will be discharged in a fan-she ed horizontal sheet. NELs N J. RUSSELL. .Witnes'ses:

Ones. C. Tummy,

A. S. PEILLHS. 

